SeekTek Heating and Cooling

About SEEKTEK Heating & Air Conditioning

SEEKTEK Mechanical has specialized in residential, commercial and industrial heating and air conditioning in St. Louis, St. Charles, Warren, and Lincoln counties for 25 years. We service and install all brands of commercial refrigeration units including walk-in coolers, reach-in coolers, ice machines, and freezers. We also install gas logs and fireplaces, gas lines, outdoor kitchens, humidifiers, dehumidifiers, boilers, radiant heat, and wine coolers.

In addition to providing outstanding products and custom services, SEEKTEK gives back to the community by supporting events such as the 2013 Alzheimer’s Walk for a Cure.

SEEKTEK has the following industry certifications:

  • Refrigeration Environmental Protection Association E.P.A. certified
  • NCI National Comfort Institute Carbon monoxide certified
  • L.P. Gas Certified
  • A.S.S.E. Approved Backflow Prevention Assembly Tester
  • MO Department of Natural Resources Backflow Certified
  • NATE Certified


Donna Sieker

Office Manager

  • 30 years as a senior manager for a Fortune 500 company

Mike Sieker


  • 2 year Associate degree in Electronic Engineering from Florissant Valley College
  • 2 year Associate degree in Heating, Ventilation and Air Conditioning from Vatterott College
  • 25 years experience in HVAC
  • Licensed Mechanical Contractor in St. Louis and St. Charles County
  • Pipefitter, Plumber, Steamfitter and Journeyman
  • OSHA Safety Certification

Josh Sieker

Service Manager

  • High School Diploma from Ft. Zumwalt South
  • 2 year Training Certification from Lewis and Clark Technical School in HVAC
  • 2 year Associates degree in HVAC from Linn State College
  • 8 years field experience in HVAC

Preferred Contractor

We are licensed, bonded and insured in St. Charles County, License number M2889B, and St. Louis County, license number MCC-X0325. Our hours of operation are 7am-7pm Monday through Saturday, and Sunday emergency service.

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